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Entanglement concentration with quantum nondemolition Hamiltonians
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dc.contributor.author | Tatham, Richard | |
dc.contributor.author | Korolkova, Natalia | |
dc.date.accessioned | 2014-09-17T09:01:08Z | |
dc.date.available | 2014-09-17T09:01:08Z | |
dc.date.issued | 2014-01-09 | |
dc.identifier | 149091233 | |
dc.identifier | b88bc69e-eca0-4664-bc08-3c3e41484e0f | |
dc.identifier | 000332169700002 | |
dc.identifier | 84892496300 | |
dc.identifier | 000332169700002 | |
dc.identifier.citation | Tatham , R & Korolkova , N 2014 , ' Entanglement concentration with quantum nondemolition Hamiltonians ' , Physical Review. A, Atomic, molecular, and optical physics , vol. 89 , no. 1 , 012308 . https://doi.org/10.1103/PhysRevA.89.012308 | en |
dc.identifier.issn | 1050-2947 | |
dc.identifier.other | ORCID: /0000-0003-4830-9667/work/59302821 | |
dc.identifier.uri | https://hdl.handle.net/10023/5428 | |
dc.description | We also acknowledge an EU grant under the FET-Open project COMPAS (No. 212008) and are grateful for the support of the Scottish Universities Physics Alliance (SUPA). | en |
dc.description.abstract | We devise and examine two procrustean entanglement concentration schemes using quantum nondemolition (QND) interaction Hamiltonians in the continuous variable regime, applicable for light, for atomic ensembles or in a hybrid setting. We thus expand the standard entanglement distillation toolbox for use of a much more general, versatile, and experimentally feasible interaction class. The first protocol uses Gaussian ancillary modes and a non-Gaussian postmeasurement, the second a non-Gaussian ancillary mode and a Gaussian postmeasurement. We explicitly calculate the density matrix elements of the non-Gaussian mixed states resulting from these protocols using an elegant Wigner-function-based method in a numerically efficient manner. We then quantify the entanglement increase calculating the logarithmic negativity of the output state and discuss and compare the performance of the protocols. | |
dc.format.extent | 9 | |
dc.format.extent | 815204 | |
dc.language.iso | eng | |
dc.relation.ispartof | Physical Review. A, Atomic, molecular, and optical physics | en |
dc.subject | Gaussian-Wigner function | en |
dc.subject | Distillation | en |
dc.subject | Light | en |
dc.subject | QC Physics | en |
dc.subject.lcc | QC | en |
dc.title | Entanglement concentration with quantum nondemolition Hamiltonians | en |
dc.type | Journal article | en |
dc.contributor.sponsor | European Commission | en |
dc.contributor.institution | University of St Andrews. School of Physics and Astronomy | en |
dc.identifier.doi | 10.1103/PhysRevA.89.012308 | |
dc.description.status | Peer reviewed | en |
dc.identifier.grantnumber | 212008 | en |
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